This varies depending on which type of system you have and whether it is being used for Domestic or Commercial use. Please refer to your user manual for warranty details. You can download a copy of your user manual by visiting Technical Support:

General Questions

The Bosch Thermotechnology division has been manufacturing and designing Solar Hot Water Systems for over 25 years. Bosch has manufacturing plants in Germany and Portugal and is one of the largest and most reputable solar manufacturers in the world. Bosch continues to invest in research and development and manufacturing capacity to bring innovative and high quality solar products to the New Zealand market.

Bosch has many distributors across New Zealand. Most plumbing & trade stores will be able to sell you a Bosch Hot Water System. To locate these suppliers, we recommend searching online or alternatively in paper advertisements such as the Yellow Pages. If you are still having difficulty, please contact us on 0800 54 33 55 and we can assist you with your inquiry.

The positioning of the water heater is very important for a couple of reasons; for efficiency you would want the unit closest to the most used outlet as it may affect water flow and lag times. Safety regulations are another aspect that has to be taken into consideration when installing the appliance.

Note that it is illegal and dangerous to replace or service any part of the hot water unit if you are not a registered plumber or gasfitter. If this is the case we would suggest contacting a registered Bosch Service Agent. Otherwise, you can source spare parts from any of the large retail and trade wholesalers that specialise in plumbing.

Bosch hot water units are compatible with most taps but some flick mixer taps have a flow rate that is below the minimum required for operation.Bosch recommends that shower heads must be a minimum of 9 litres per minute and other fixtures 7.5 litres per minute.You are able to use a water saving shower head as long as is 9 litres per minute.

No. Despite, all Bosch Hot Water Systems being tested in the factory, gas inlet pressures and burner pressures (for the Bosch Mechanical Range) need to be set and checked and set upon installation and at every service to ensure correct operation.

The Bosch External HydroPower (10H & 13H) should be connected to at least one 45kg LPG cylinder. The Bosch External HydroPower (16H) model, the Highflow range, and 32 Series should be connected with two 45kg LPG cylinders with auto changeover regulators.Bosch Hot Water & Heating Products

Flue piping can be sourced by the plumber from his normal plumbing supplier for the Internal Compact and External HydroPower ranges. Generally, Duravent twin skin flue pipe made by Abey is the recommended flue pipe to use.

For our 32 Series (32 & 32Q), 32C and Boiler range, Bosch sell flue piping and kits which are specifically designed for these appliances.

Bosch Electronic Highflow:Yes, you must make sure you current model has “Heat Resistance” enabled. To do this simply locate the model number on the right hand side panel and check to see if the letter “H” is included in the model number, for example YS2170RAHNG/LP. If you do not have a heat resistant model then you will require a Bosch solar transfer valve (MIX11089) which can be purchased at your local plumbing and trade store.

Bosch 26eco+:No. However, if you use a solar transfer valve the Bosch 26eco can be used as a solar booster

Bosch External HydroPower:No, these units are mechanical units, which means they do not have the ability to read incoming temperature and regulate themselves. This can lead to overheating of water which is a health and safety concern. Gas Hot Water Systems

Gas Hot Water Systems - External HydroPower

- No, not with Bosch External HydroPower units. Controllers can only be installed with the Bosch Highflow range, Bosch 32 Series, Bosch 32C and the Bosch 26eco+. All of these units have electronic control capability which allows them to be connected with a temperature controller.
- You can install a maximum of four temperature controllers - 1 main, 1 bathroom and 2 sub-controllers (except with Bosch 32 Series & 32C products).
- Bosch 32 Series (KM3211WHNG/LP), and 32C (BC3200RANG/LP) units can be used with up to 3 temperature controllers.
- Bosch 32Q models (KM3211WHQNG/LP) include 1 main controller as standard.
Controllers

Gas Hot Water Systems - Internal Compact

Yes, as long as it fits the requirements of the hot water unit you are installing. Please consult your plumber/gasfitter. Please be aware that the Internal Compact range can only be flued vertically in order to avoid flue gases spilling back in to the room. If this happens, the appliance automatically shuts off as a safety measure.Internal Compact

Please follow these instructions:
1. Turn a hot water tap on, leave it running and head outside.
2. Turn the water inlet valve off/shut (this is the valve that supplies the cold water to the unit, if you look underneath the unit at the bottom panel you will see which pipe is the “cold” pipe)
3. Switch the power point off and wait five seconds.
4. After five seconds, turn the power point back on and open/release the water valve.
5. Your hot water unit should now be operational again.
If problems persist please call 0800 54 33 52.
We advise that you contact your gas supplier and ask for an “Automatic Changeover Kit” to be installed and this should prevent this problem from happening in the future.Contact-Us

Gas Hot Water Systems - Highflow

For safety reasons, the maximum temperature is factory-set at 55°C with the Highflow range and 26eco+ models. The 32 Series and the 32C are factory-set to 60°C. However, maximum temperatures can be increased up to 75°C (Highflow and 26eco+) and 83°C (32 Series and 32C), if necessary. The maximum temperature should only be adjusted by a licenced plumber. Gas Hot Water Systems

Solar Hot Water Systems

Water heating accounts for 25 per cent of the energy used in an average New Zealand home. More than half of hot water use is in the bathroom, a third is in the laundry and the remainder is in the kitchen.
The installation of a more energy-efficient hot water appliance, such as a Bosch Solar Hot Water System, will reduce energu use, and save you money on energy bills.
Bosch Renewable Energy Hot Water Systems

The appropriate size of the Bosch Solar Hot Water System will depend on your location in New Zealand, as well as how many people it is required to service. Please contact Bosch Hot Water on 0800 54 33 52 for more information on the best system to suit your needs.

Yes, even with less sunshine, solar radiation is effective to heat water but at a lower level. Bosch Solar Hot Water Systems have either an electric or gas booster, making sure you always have instant hot water, regardless of the weather outside.

The pump light on your Senztec controller will light up when the temperature in the panel is greater than the temperature in the tank by a set difference. Assuming there is no fault with the pump then the hot water in the panels will be pumped into the tank. Colder water from the tank will replace the water taken from the panels and get heated.

Heating Systems

Hydronic heating is based on the simple principle of heating water with a boiler and circulating the hot water through a loop of pipes and radiators, which deliver the heat into the rooms. Apart from the initial water that
is required to fill the loop and a small amount to top up the system occasionally, no additional water usage is created. Hydronic heating can easily be zoned so that unused rooms are not heated, which saves
energy.
Underfloor heating is another way of utilising hydronic heating, which means that instead of flowing through radiators, the hot water flows through pipes underneath the floor. This way the room gets heated from the
floor upwards, which adds even more comfort.

System boiler: Many of the components of the hydronic heating system, such as an expansion vessel, are built into the Bosch system boiler itself, making it quick and easy to install. In the Bosch hydronic heatingrange, the Bosch Condens 5000W 18 kW and 30 kW models are system boilers, which are designed for supplying hot water for heating your home.Combi boiler: A combination boiler is capable of providing both central heating and domestic hot water. Combining two appliances, a Bosch Condens 5000W 37kW ‘Combi’ uses high-efficiency condensingtechnology for both heating and domestic hot water, which saves you money in two ways.

The Bosch Condens 5000W 37 kW combi boiler can supply 21 litres of hot water per minute at a 25°C temperature rise. This means that, depending on your local water inlet temperature, you can generally run 2standard shower heads (9 l/min) at the same time.

A programmer operates the heating system to turn on for set periods of time. It will take approximately 30 minutes for your home to reach the desired temperature depending on insulation levels and outsidetemperature. Programmers can be set to run different programs for different days of the week (e.g. during the week and on weekends). Bosch offer the DT20 programmer.A room thermostat controls the air temperature in a room. It should be located away from direct sunlight and clear of curtains or furniture. A thermostat can be digital or analogue. Bosch offer the FR10 intelligentroom thermostat.A programmable room thermostat allows you to program the room temperature levels according to different times of the day and night. The control always maintains a temperature within the property (as set bythe user) so that the boiler is only ever "topping up" the temperature in the home. Bosch offer the FR110, DT20RF and DT10RF programmable room thermostats and the FW100 weather compensat

Bosch recommend that you get your boiler serviced at least every second year by a Bosch recommended boiler service agent. Never try to service the boiler yourself as this is against the law and also voids theproduct's warranty. However, before you call your Bosch recommended boiler service agent, you can perform the following basic checks: 1. Is the thermostat or programmer is set at the desired temperature? 2. Isyour boiler pressurised at the required 1.5 bar? You can check this on a small gauge behind the front panel of the boiler. 3. If you have any other gas appliances in your property, check whether they are having gassupplied to them. 4. Is the boiler is displaying any fault codes or is flashing a blue light? To reset the fault code, press the reset button for 3 seconds. If the error persists, call Bosch on 0800 54 33 52 to get incontact with your Bosch recommended boiler service agent.Contact-Us